5 files changed, 61 insertions, 0 deletions
diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index 9bd647fa19f..e058361e4d1 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -625,6 +625,43 @@ gbm_dri_bo_get_planes(struct gbm_bo *_bo)
    return get_number_planes(dri, bo->image);
 }
 
+static union gbm_bo_handle
+gbm_dri_bo_get_handle_for_plane(struct gbm_bo *_bo, int plane)
+{
+   struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
+   struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+   union gbm_bo_handle ret;
+   ret.s32 = -1;
+
+   if (!dri->image || dri->image->base.version < 13 || !dri->image->fromPlanar) {
+      errno = ENOSYS;
+      return ret;
+   }
+
+   if (plane >= get_number_planes(dri, bo->image)) {
+      errno = EINVAL;
+      return ret;
+   }
+
+   /* dumb BOs can only utilize non-planar formats */
+   if (!bo->image) {
+      assert(plane == 0);
+      ret.s32 = bo->handle;
+      return ret;
+   }
+
+   __DRIimage *image = dri->image->fromPlanar(bo->image, plane, NULL);
+   if (image) {
+      dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_HANDLE, &ret.s32);
+      dri->image->destroyImage(image);
+   } else {
+      assert(plane == 0);
+      dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE, &ret.s32);
+   }
+
+   return ret;
+}
+
 static void
 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 {
@@ -1118,6 +1155,7 @@ dri_device_create(int fd)
    dri->base.base.bo_write = gbm_dri_bo_write;
    dri->base.base.bo_get_fd = gbm_dri_bo_get_fd;
    dri->base.base.bo_get_planes = gbm_dri_bo_get_planes;
+   dri->base.base.bo_get_handle = gbm_dri_bo_get_handle_for_plane;
    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
    dri->base.base.destroy = dri_destroy;
    dri->base.base.surface_create = gbm_dri_surface_create;
diff --git a/src/gbm/gbm-symbols-check b/src/gbm/gbm-symbols-check
index 8c4da1b7ea2..1e6dd4d3ec0 100755
--- a/src/gbm/gbm-symbols-check
+++ b/src/gbm/gbm-symbols-check
@@ -19,6 +19,7 @@ gbm_bo_get_device
 gbm_bo_get_handle
 gbm_bo_get_fd
 gbm_bo_get_plane_count
+gbm_bo_get_handle_for_plane
 gbm_bo_write
 gbm_bo_set_user_data
 gbm_bo_get_user_data
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c
index 37795175644..066ceffc0a3 100644
--- a/src/gbm/main/gbm.c
+++ b/src/gbm/main/gbm.c
@@ -234,6 +234,24 @@ gbm_bo_get_plane_count(struct gbm_bo *bo)
    return bo->gbm->bo_get_planes(bo);
 }
 
+/** Get the handle for the specified plane of the buffer object
+ *
+ * This function gets the handle for any plane associated with the BO. When
+ * dealing with multi-planar formats, or formats which might have implicit
+ * planes based on different underlying hardware it is necessary for the client
+ * to be able to get this information to pass to the DRM.
+ *
+ * \param bo The buffer object
+ * \param plane the plane to get a handle for
+ *
+ * \sa gbm_bo_get_handle()
+ */
+GBM_EXPORT union gbm_bo_handle
+gbm_bo_get_handle_for_plane(struct gbm_bo *bo, int plane)
+{
+   return bo->gbm->bo_get_handle(bo, plane);
+}
+
 /** Write data into the buffer object
  *
  * If the buffer object was created with the GBM_BO_USE_WRITE flag,
diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h
index 203a2363579..67548206c40 100644
--- a/src/gbm/main/gbm.h
+++ b/src/gbm/main/gbm.h
@@ -318,6 +318,9 @@ gbm_bo_get_fd(struct gbm_bo *bo);
 int
 gbm_bo_get_plane_count(struct gbm_bo *bo);
 
+union gbm_bo_handle
+gbm_bo_get_handle_for_plane(struct gbm_bo *bo, int plane);
+
 int
 gbm_bo_write(struct gbm_bo *bo, const void *buf, size_t count);
 
diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h
index c6a6701464a..0ec531d0991 100644
--- a/src/gbm/main/gbmint.h
+++ b/src/gbm/main/gbmint.h
@@ -77,6 +77,7 @@ struct gbm_device {
    int (*bo_write)(struct gbm_bo *bo, const void *buf, size_t data);
    int (*bo_get_fd)(struct gbm_bo *bo);
    int (*bo_get_planes)(struct gbm_bo *bo);
+   union gbm_bo_handle (*bo_get_handle)(struct gbm_bo *bo, int plane);
    void (*bo_destroy)(struct gbm_bo *bo);
 
    struct gbm_surface *(*surface_create)(struct gbm_device *gbm,